We have such faith in our
calculators. It is hard to believe that they do not have the
answers to ALL calculations, even in approximate form.

But, unfortunately, there is a
point beyond which our calculator cannot compute. Most
calculators, including the TI-83+/84+, cannot handle numbers larger
than 9.99999999 x 10
99.
Numbers beyond this value create an overflow error.

As an
example, the largest factorial that can be computed on the TI-83+/84+
is the factorial 69!. The factorial
70! produces an overflow error.

It is possible
to continue investigating some larger factorials by
multiplying the decimal portion of 69!.